custody there are situations now where a lot of people would say, you don't need to read miranda rights right away. this decision -- if a very strong suspect is picked up or somebody could provide significant information, i think that decision, whether or not to mirandize could be -- >> presumably as the fbi is going through this, they are looking to make sure there are no secondary attacks, first priority, right, imminent threat. >> absolutely. >> and second of all, to make sure they maintain the possibility of ultimately getting a criminal conviction? >> absolutely. >> joining us is an eyewitness to the bombing. he ran the marathon and was in the medical tent when the explosions happened. joining us by phone from boston. describe what you were doing in the medical tent at what time and what the scene there was like. >> yeah. the first thing, this was wave three, so i was running -- i was a charity runner, so we started at approximately 10:40 a.m. then i finished just under four, my first under four, thus i pushed pretty hard mile 25 and 26. that means i was pretty winded, dizzy and fe